|This is typical trojan behavior.. |
Go onto download.com and download the program Spybot - Search and Destroy, it will find whatever threat is doing this to your computer and kill it.
If it is a trojan, it is most likely messing with your registry settings as well, and depending on this errors, Spybot will fix those too. However, if some issues still persist afterwards, check out Registry Mechanic on the same website.
I really hope this helps!